An Aeromagnetic Survey of the Chile Ridge

智利海脊是全球海脊的主要分支 系统海底扩张形成的磁性线理 在智利海脊上记录了 南极板块和纳斯卡板块 两千五百万年前的法拉隆板块。这些磁性 线理详细记录了 这一地区在新第三纪。然而， 智利海脊无法用海流精确分辨 由船只收集的一组磁性数据。航空磁力测量 智利海岭的位置将使PI能够绘制出 智利海脊的异常模式资金 支持拉蒙科学家参与 调查的采集和解释阶段， 由海军研究实验室（NRL）管理。航磁数据，沿着 利用现有船上海洋地球物理数据和GEOSAT/SEASAT 大地水准面测高数据，将用于重建一个详细的 智利海脊在新近纪的构造历史。这 详细的构造历史将为研究 智利海脊和纳斯卡板块的影响 脊沟碰撞

The Chile Ridge is a major branch of the global ridge system. The magnetic lineations formed by seafloor spreading on the Chile Ridge have recorded the relative motion of the Antarctic and Nazca plates since the breakup of the Farallon plate around 25 million years ago. These magnetic lineations contain adetailed record of the tectonic history of this region during the Neogene. However, the spreading history of the Chile Ridge cannot be accurately resolved with the current set of magnetic data collected by ships. An aeromagnetic survey of the Chile Ridge would enable the PIs to map the magnetic anomaly pattern on the Chile Ridge in considerable detail. Funds are provided to support the participation of Lamont scientists in both the acquisition and interpretation phases of the survey to be run by Naval Research Lab (NRL). The aeromagnetics data, along with existing shipboard marine geophysical data and GEOSAT/SEASAT geoid altimetry data, will be used to reconstruct a detailed tectonic history of the Chile Ridge during the Neogene. This detailed tectonic history will provide the basis for studying the effect on the Chile Ridge and Nazca plate of a series of Neogene ridge-trench collisions.